﻿using System;
using System.Collections.Generic;
using System.Text;

namespace ZhCun.Utils.Helpers
{
    /// <summary>
    /// 关于金额有关操作,如:金额大写
    /// </summary>
    public class MoneyHelper
    {
        private static readonly string cnNumber = "零壹贰叁肆伍陆柒捌玖";
        private static readonly string cnUnit = "分角元拾佰仟万拾佰仟亿拾佰仟兆拾佰仟";

        private static readonly string[] enSmallNumber = { "", "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX", "SEVEN", "EIGHT", "NINE", "TEN", "ELEVEN", "TWELVE", "THIRTEEN", "FOURTEEN", "FIFTEEN", "SIXTEEN", "SEVENTEEN", "EIGHTEEN", "NINETEEN" };
        private static readonly string[] enLargeNumber = { "TWENTY", "THIRTY", "FORTY", "FIFTY", "SIXTY", "SEVENTY", "EIGHTY", "NINETY" };
        private static readonly string[] enUnit = { "", "THOUSAND", "MILLION", "BILLION", "TRILLION" };


        // 以下是货币金额中文大写转换方法
        public static string GetCnString(string MoneyString)
        {
            String[] tmpString = MoneyString.Split('.');
            String intString = MoneyString;   // 默认为整数
            String decString = "";            // 保存小数部分字串
            String rmbCapital = "";            // 保存中文大写字串
            int k;
            int j;
            int n;

            if (tmpString.Length > 1)
            {
                intString = tmpString[0];             // 取整数部分
                decString = tmpString[1];             // 取小数部分
            }
            decString += "00";
            decString = decString.Substring(0, 2);   // 保留两位小数位
            intString += decString;

            try
            {
                k = intString.Length - 1;
                if (k > 0 && k < 18)
                {
                    for (int i = 0; i <= k; i++)
                    {
                        j = (int)intString[i] - 48;
                        // rmbCapital = rmbCapital + cnNumber[j] + cnUnit[k-i];     // 供调试用的直接转换
                        n = i + 1 >= k ? (int)intString[k] - 48 : (int)intString[i + 1] - 48; // 等效于 if( ){ }else{ }
                        if (j == 0)
                        {
                            if (k - i == 2 || k - i == 6 || k - i == 10 || k - i == 14)
                            {
                                rmbCapital += cnUnit[k - i];
                            }
                            else
                            {
                                if (n != 0)
                                {
                                    rmbCapital += cnNumber[j];
                                }
                            }
                        }
                        else
                        {
                            rmbCapital = rmbCapital + cnNumber[j] + cnUnit[k - i];
                        }
                    }

                    rmbCapital = rmbCapital.Replace("兆亿万", "兆");
                    rmbCapital = rmbCapital.Replace("兆亿", "兆");
                    rmbCapital = rmbCapital.Replace("亿万", "亿");
                    rmbCapital = rmbCapital.TrimStart('元');
                    rmbCapital = rmbCapital.TrimStart('零');

                    return rmbCapital;
                }
                else
                {
                    return "";   // 超出转换范围时，返回零长字串
                }
            }
            catch
            {
                return "";   // 含有非数值字符时，返回零长字串
            }
        }


        // 以下是货币金额英文大写转换方法
        public static string GetEnString(string MoneyString)
        {
            String[] tmpString = MoneyString.Split('.');
            String intString = MoneyString;   // 默认为整数
            String decString = "";            // 保存小数部分字串
            String engCapital = "";            // 保存英文大写字串
            String strBuff1;
            String strBuff2;
            String strBuff3;
            int curPoint;
            int i1;
            int i2;
            int i3;
            int k;
            int n;

            if (tmpString.Length > 1)
            {
                intString = tmpString[0];             // 取整数部分
                decString = tmpString[1];             // 取小数部分
            }
            decString += "00";
            decString = decString.Substring(0, 2);   // 保留两位小数位
            try
            {                  // 以下处理整数部分    
                curPoint = intString.Length - 1; if (curPoint >= 0 && curPoint < 15)
                {
                    k = 0;
                    while (curPoint >= 0)
                    {
                        strBuff1 = ""; strBuff2 = ""; strBuff3 = ""; if (curPoint >= 2)
                        {
                            n = int.Parse(intString.Substring(curPoint - 2, 3)); if (n != 0)
                            {
                                i1 = n / 100;           // 取佰位数值                         
                                i2 = (n - i1 * 100) / 10;   // 取拾位数值  
                                i3 = n - i1 * 100 - i2 * 10;  // 取个位数值  
                                if (i1 != 0) { strBuff1 = enSmallNumber[i1] + " HUNDRED "; } if (i2 != 0) { if (i2 == 1) { strBuff2 = enSmallNumber[i2 * 10 + i3] + " "; } else { strBuff2 = enLargeNumber[i2 - 2] + " "; if (i3 != 0) { strBuff3 = enSmallNumber[i3] + " "; } } } else { if (i3 != 0) { strBuff3 = enSmallNumber[i3] + " "; } } engCapital = strBuff1 + strBuff2 + strBuff3 + enUnit[k] + " " + engCapital;
                            }
                        }
                        else
                        {
                            n = int.Parse(intString.Substring(0, curPoint + 1)); if (n != 0)
                            {
                                i2 = n / 10;      // 取拾位数值                       
                                i3 = n - i2 * 10;   // 取个位数值          
                                if (i2 != 0) { if (i2 == 1) { strBuff2 = enSmallNumber[i2 * 10 + i3] + " "; } else { strBuff2 = enLargeNumber[i2 - 2] + " "; if (i3 != 0) { strBuff3 = enSmallNumber[i3] + " "; } } } else { if (i3 != 0) { strBuff3 = enSmallNumber[i3] + " "; } } engCapital = strBuff2 + strBuff3 + enUnit[k] + " " + engCapital;
                            }
                        } ++k; curPoint -= 3;
                    } engCapital = engCapital.TrimEnd();
                }
                // 以下处理小数部分          
                strBuff2 = ""; strBuff3 = ""; n = int.Parse(decString); if (n != 0)
                {
                    i2 = n / 10;      // 取拾位数值                   
                    i3 = n - i2 * 10;   // 取个位数值                 
                    if (i2 != 0) { if (i2 == 1) { strBuff2 = enSmallNumber[i2 * 10 + i3] + " "; } else { strBuff2 = enLargeNumber[i2 - 2] + " "; if (i3 != 0) { strBuff3 = enSmallNumber[i3] + " "; } } } else { if (i3 != 0) { strBuff3 = enSmallNumber[i3] + " "; } }                        // 将小数字串追加到整数字串后  
                    if (engCapital.Length > 0)
                    {
                        engCapital = engCapital + " AND CENTS " + strBuff2 + strBuff3;   // 有整数部分时              
                    }
                    else
                    {
                        engCapital = "CENTS " + strBuff2 + strBuff3;   // 只有小数部分时             
                    }
                } engCapital = engCapital.TrimEnd(); return engCapital;
            }
            catch
            {
                return "";   // 含非数字字符时，返回零长字串        
            }
        }
        /// <summary>
        /// 将金额转换为财务大写形式,只保留两位小数
        /// </summary>
        public static string GetMoenyUpperCN(double money)
        {
            try
            {
                return GetCnString(money.ToString());
            }
            catch (Exception ex)
            {

                throw ex;
            }
        }
        /// <summary>
        /// 将金额转换为财务大写形式,只保留两位小数(英文格式)
        /// </summary>
        public static string GetMoneyUpperEN(double money)
        {
            try
            {
                return GetEnString(money.ToString());
            }
            catch (Exception ex)
            {

                throw ex;
            }
        }
    }
}